Telecommunications – Transmitter and receiver at same station – With a common signal processing stage
Patent
1985-07-31
1987-04-28
Ng, Jin F.
Telecommunications
Transmitter and receiver at same station
With a common signal processing stage
455 90, 455129, 455346, 455348, 339 75M, 343851, H04B 138, H04B 108, H04B 104
Patent
active
046619925
ABSTRACT:
A portable radio transceiver and mobile mount housing are disclosed which utilize a switchless connector for connecting the portable unit to an external antenna which is electrically coupled to the mobile mount. In the preferred embodiment, the portable radio is equipped with an internal antenna which is either coupled to an electrical contact on the exterior of the portable unit adaptable to making electrical contact with a similar contact on the inside of the mobile housing when the portable radio is inserted therein. The internal antenna in the portable unit is shielded by the metallic mobile mount housing which obviates the need to disconnect the same. In one embodiment the contact disposed on the portable unit exterior is connected to a predetermined point on the internal antenna for impedance matching with the external antenna when the portable unit is inserted into the mobile mount housing. Similar switchless contacts can also be utilized for connecting the portable unit to external microphones, speakers, battery chargers and the like.
REFERENCES:
patent: 3917372 (1975-11-01), Selinko
patent: 3946390 (1976-03-01), Alexander et al.
patent: 4031468 (1977-06-01), Ziebell et al.
patent: 4091318 (1978-05-01), Eichler et al.
patent: 4106025 (1978-08-01), Katz
patent: 4193076 (1980-03-01), Ito et al.
patent: 4286335 (1981-08-01), Eichler et al.
patent: 4313119 (1982-01-01), Garay et al.
COMCO Model 812 Portacom, "All-Solid-State Mobile/Portable Transceiver", 1/74.
Balzano Quirino
Garay Oscar
Turner, Jr. Harvey N.
Downey Joseph T.
McKinley Martin J.
Motorola Inc.
Ng Jin F.
Nichols Daniel K.
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